The fields that can be specified in model statements are the same fields that can be specified in an ordinary assembler language statement. They are the name, operation, operand, and remarks fields. You can also specify a continuation-indicator field, an identification-sequence field, and, in source macro definitions, a field before the begin column if the correct ICTL instruction has been specified. Character strings in the last three fields (in the standard format only, columns 72 through 80) are generated exactly as they appear in the model statement, and no values are substituted for variable symbols.

Model statements must have an entry in the operation field, and, in most cases, an entry in the operand field in order to generate valid assembler language instructions.